Ingonish Beach
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Ingonish Beach clear sky chart from 2005-11-06 to 2024-01-16.

This page is a summary of past forecasts. Even though it's based only on forecasts, some people use these pages as clue to a site's climate. But climate data based on actual observation should be preferred (if you can find it!).

Cloud, Transparency and Seeing forecasts are summarized individually. But because good observing conditions require a combination of minimum cloud cover, transparency and seeing, the individual forecast summaries can be difficult to interpret. The observing conditions section counts the combinations of conditions needed for common types of astronomical observation.

Observing Conditions

The following tables count the occurrence of the combinations of forecast and darkness conditions needed for different observations. Conditions are rated by by what percentage of the hours the observation would likely be attempted are usable.

Observation Type	Minimum conditions for hour to be usable				Out of hours
	Clear of Clouds	Transparency	Seeing	Sky Brightness
Planetary:	50%	(no limit)	Average	(no limit)	Nighttime Hours
Deep Sky:	70%	Average	(no limit)	5.9	Nighttime Hours
CCD Imaging:	70%	Below Average	Poor	(no limit)	Nighttime Hours

Percentages are of nighttime hours per month, or per year, when a particular observing conditions was met. Deep Sky percentages never exceed 50% because the moon is up half the time. Deep sky percentages are much lower for charts at high latitudes because of fewer dark hours in the summer.

Overall

By Month

Individual Forecasts

The length of each colored bar in the "occurrence of each Forecast" column is proportional to the number of times the chart forecast that color. The percentages are of the total number of hours per month, or per year, with a particular forecast. The colors as the same as those used in clear sky charts.

Note: Transparency probabilities are only counted for those hours that have 30% or less cloud cover. Seeing probabilities are only counted for those hours that have 80% or less cloud cover. If that's too tricky, try Observing Conditions instead.

Overall

		Occurrence of each Forecast	Data Points
Cloud Cover	Day	17% 10% 4 8% 7% 4 6% 5% 6% 7% 26%	74767
	Night	17% 9% 4 8% 7% 4 6% 6% 6% 7% 27%	75050
Transparency	Day	55% 11% 13% 15% 6% 1	74470
	Night	56% 11% 12% 14% 6%	74882
Seeing	Day	23% 14% 29% 24% 9% 1	16542
	Night	24% 15% 28% 24% 8% 1	24006

By Month

Percentage Cloud Cover NE (2006-)
Color Meanings: Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	15% 11% 5% 13% 9% 5% 9% 7% 7% 6% 15%	1516
	11th to 20th	Day	14% 13% 5% 12% 10% 5% 8% 6% 7% 6% 15%	1481
	21st to end	Day	10% 7% 5% 14% 12% 6% 8% 8% 7% 7% 17%	1588
February	1st to 10th	Day	13% 10% 4 13% 11% 6% 8% 7% 8% 7% 14%	1620
	11th to 20th	Day	12% 13% 4 10% 9% 5% 7% 7% 7% 6% 21%	1573
	21st to end	Day	5% 11% 6% 11% 9% 5% 6% 6% 5% 7% 28%	1480
March	1st to 10th	Day	9% 15% 7% 9% 9% 4 5% 5% 5% 8% 26%	1796
	11th to 20th	Day	11% 9% 7% 9% 8% 5% 6% 5% 6% 7% 27%	1948
	21st to end	Day	15% 13% 4 9% 7% 4 7% 4 5% 6% 25%	2312
April	1st to 10th	Day	17% 11% 5% 10% 7% 4 6% 6% 6% 6% 23%	2160
	11th to 20th	Day	19% 9% 3 7% 5% 3 4 4 5% 5% 35%	2134
	21st to end	Day	21% 11% 4 6% 6% 3 4 4 5% 7% 29%	2345
May	1st to 10th	Day	21% 9% 4 6% 6% 4 5% 5% 5% 8% 27%	2520
	11th to 20th	Day	19% 10% 3 7% 5% 4 5% 4 5% 6% 32%	2478
	21st to end	Day	15% 9% 3 7% 6% 3 5% 5% 6% 8% 33%	2724
June	1st to 10th	Day	25% 9% 3 6% 5% 3 4 4 6% 8% 25%	2520
	11th to 20th	Day	17% 8% 3 6% 5% 4 4 5% 5% 8% 34%	2520
	21st to end	Day	22% 10% 4 8% 7% 3 4 5% 5% 5% 28%	2520
July	1st to 10th	Day	14% 7% 3 6% 5% 3 6% 5% 6% 10% 34%	2520
	11th to 20th	Day	14% 6% 3 7% 6% 3 6% 5% 7% 9% 34%	2520
	21st to end	Day	20% 7% 3 7% 6% 3 5% 6% 6% 8% 28%	2745
August	1st to 10th	Day	18% 5% 3 5% 5% 4 6% 6% 7% 10% 31%	2506
	11th to 20th	Day	19% 7% 3 8% 6% 3 4 6% 6% 8% 31%	2318
	21st to end	Day	15% 7% 3 6% 5% 4 5% 6% 6% 8% 34%	2376
September	1st to 10th	Day	15% 6% 3 6% 6% 3 4 5% 6% 8% 38%	2160
	11th to 20th	Day	19% 8% 3 6% 6% 3 5% 4 6% 7% 33%	2149
	21st to end	Day	18% 6% 2 5% 5% 3 4 6% 6% 9% 36%	1940
October	1st to 10th	Day	17% 8% 3 6% 6% 3 5% 5% 7% 8% 33%	1800
	11th to 20th	Day	18% 10% 4 7% 7% 4 6% 6% 6% 7% 25%	1800
	21st to end	Day	20% 12% 4 9% 7% 6% 6% 5% 5% 5% 20%	1796
November	1st to 10th	Day	18% 14% 5% 9% 7% 4 5% 5% 5% 6% 22%	1653
	11th to 20th	Day	18% 15% 7% 9% 9% 6% 6% 6% 5% 5% 15%	1520
	21st to end	Day	15% 14% 7% 9% 8% 5% 6% 6% 7% 8% 15%	1520
December	1st to 10th	Day	19% 15% 7% 13% 7% 6% 7% 6% 5% 5% 10%	1520
	11th to 20th	Day	27% 12% 6% 12% 7% 5% 6% 6% 5% 6% 8%	1906
	21st to end	Day	20% 13% 8% 11% 10% 4 6% 5% 5% 4 12%	2783
January	1st to 10th	Night	13% 13% 5% 12% 9% 4 8% 6% 6% 7% 15%	2649
	11th to 20th	Night	15% 9% 5% 11% 10% 6% 8% 7% 7% 7% 14%	2601
	21st to end	Night	12% 8% 4 10% 9% 5% 8% 9% 7% 9% 19%	2763
February	1st to 10th	Night	13% 9% 4 11% 9% 5% 7% 7% 8% 9% 18%	2340
	11th to 20th	Night	13% 11% 4 7% 8% 5% 6% 7% 6% 8% 24%	2273
	21st to end	Night	8% 10% 6% 9% 8% 5% 6% 6% 6% 8% 28%	1776
March	1st to 10th	Night	12% 13% 5% 8% 8% 3 6% 6% 6% 6% 29%	2151
	11th to 20th	Night	12% 11% 3 7% 7% 4 6% 5% 6% 8% 31%	2009
	21st to end	Night	15% 10% 4 9% 6% 4 6% 5% 5% 7% 28%	2044
April	1st to 10th	Night	20% 11% 2 7% 6% 2 5% 5% 6% 7% 29%	1800
	11th to 20th	Night	16% 9% 4 6% 5% 3 4 5% 5% 7% 36%	1776
	21st to end	Night	21% 10% 3 6% 6% 3 6% 3 5% 5% 32%	1611
May	1st to 10th	Night	23% 9% 3 4 4 2 4 4 6% 8% 33%	1440
	11th to 20th	Night	17% 8% 3 4 4 3 4 5% 5% 6% 42%	1416
	21st to end	Night	14% 8% 2 4 5% 4 5% 5% 7% 10% 35%	1550
June	1st to 10th	Night	27% 9% 2 6% 6% 3 5% 4 5% 6% 25%	1440
	11th to 20th	Night	20% 7% 2 6% 4 2 4 4 6% 7% 40%	1440
	21st to end	Night	23% 7% 3 6% 6% 3 5% 5% 4 6% 33%	1440
July	1st to 10th	Night	15% 7% 3 5% 7% 4 5% 5% 7% 8% 35%	1440
	11th to 20th	Night	14% 7% 3 5% 5% 3 5% 6% 7% 8% 37%	1440
	21st to end	Night	20% 6% 3 5% 4 3 5% 6% 7% 8% 32%	1573
August	1st to 10th	Night	15% 5% 2 5% 5% 3 5% 6% 7% 9% 39%	1433
	11th to 20th	Night	17% 6% 3 5% 5% 4 5% 5% 6% 8% 36%	1578
	21st to end	Night	13% 5% 2 5% 4 3 4 5% 6% 9% 43%	1980
September	1st to 10th	Night	15% 4 2 5% 5% 3 4 5% 5% 8% 43%	1800
	11th to 20th	Night	18% 6% 1 4 4 4 5% 5% 6% 8% 40%	1810
	21st to end	Night	18% 6% 2 6% 5% 3 4 5% 5% 6% 40%	2018
October	1st to 10th	Night	15% 7% 3 5% 5% 4 6% 6% 7% 8% 35%	2160
	11th to 20th	Night	21% 7% 2 6% 6% 3 4 6% 6% 8% 30%	2160
	21st to end	Night	23% 9% 3 6% 7% 4 6% 5% 6% 8% 23%	2560
November	1st to 10th	Night	17% 10% 3 7% 7% 4 6% 7% 6% 6% 25%	2422
	11th to 20th	Night	20% 11% 4 9% 8% 5% 6% 6% 7% 7% 17%	2660
	21st to end	Night	18% 13% 5% 9% 6% 4 6% 5% 6% 9% 18%	2660
December	1st to 10th	Night	18% 13% 7% 12% 8% 4 6% 6% 5% 7% 12%	2660
	11th to 20th	Night	25% 13% 6% 10% 7% 4 6% 5% 6% 6% 11%	3293
	21st to end	Night	25% 12% 6% 12% 8% 4 5% 4 4 5% 16%	4884

Transparency (when cloud cover <= 30%)
Color Meanings: Too cloudy to forecast Poor Below Average Average Above average Transparent
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	69% 12% 10% 7% 2	1517
	11th to 20th	Day	70% 11% 11% 6% 1	1481
	21st to end	Day	66% 11% 9% 11% 3	1588
February	1st to 10th	Day	66% 11% 11% 8% 3	1620
	11th to 20th	Day	59% 14% 13% 10% 3 1	1581
	21st to end	Day	52% 11% 14% 14% 8% 2	1480
March	1st to 10th	Day	56% 9% 9% 17% 9% 1	1800
	11th to 20th	Day	53% 11% 13% 16% 6%	1948
	21st to end	Day	57% 10% 11% 14% 7% 2	2312
April	1st to 10th	Day	56% 9% 12% 14% 7% 2	2160
	11th to 20th	Day	49% 8% 12% 19% 12% 1	2134
	21st to end	Day	54% 9% 13% 15% 8% 1	2345
May	1st to 10th	Day	54% 10% 13% 15% 7% 1	2520
	11th to 20th	Day	50% 8% 12% 19% 9%	2482
	21st to end	Day	47% 10% 16% 19% 8% 1	2724
June	1st to 10th	Day	57% 9% 11% 16% 6%	2520
	11th to 20th	Day	47% 10% 13% 20% 10%	2520
	21st to end	Day	58% 10% 9% 14% 8% 1	2520
July	1st to 10th	Day	44% 11% 19% 20% 7%	2450
	11th to 20th	Day	42% 12% 18% 19% 8% 1	2444
	21st to end	Day	51% 12% 15% 15% 7%	2592
August	1st to 10th	Day	45% 12% 18% 19% 5%	2492
	11th to 20th	Day	47% 11% 16% 20% 5% 1	2318
	21st to end	Day	43% 12% 17% 22% 6%	2376
September	1st to 10th	Day	40% 12% 17% 22% 9% 1	2160
	11th to 20th	Day	48% 9% 13% 20% 8% 1	2149
	21st to end	Day	42% 12% 15% 22% 9% 1	1940
October	1st to 10th	Day	47% 11% 14% 19% 9%	1800
	11th to 20th	Day	55% 12% 14% 15% 4	1800
	21st to end	Day	63% 10% 11% 12% 4	1796
November	1st to 10th	Day	61% 10% 13% 13% 3	1653
	11th to 20th	Day	69% 10% 10% 8% 3	1520
	21st to end	Day	63% 14% 13% 8% 2	1520
December	1st to 10th	Day	75% 12% 8% 5% 1	1520
	11th to 20th	Day	76% 11% 6% 6% 1	1905
	21st to end	Day	69% 15% 8% 6% 2	2783
January	1st to 10th	Night	70% 14% 8% 7% 1	2649
	11th to 20th	Night	71% 13% 9% 5% 1	2601
	21st to end	Night	63% 13% 10% 10% 3	2763
February	1st to 10th	Night	63% 12% 11% 10% 4	2340
	11th to 20th	Night	57% 12% 14% 12% 3 1	2276
	21st to end	Night	52% 14% 11% 13% 9% 1	1776
March	1st to 10th	Night	55% 11% 10% 16% 7% 1	2160
	11th to 20th	Night	51% 9% 14% 18% 8% 1	2010
	21st to end	Night	56% 10% 10% 15% 7% 2	2044
April	1st to 10th	Night	54% 8% 11% 15% 11% 1	1800
	11th to 20th	Night	48% 8% 10% 21% 11% 2	1776
	21st to end	Night	53% 9% 11% 15% 11% 1	1611
May	1st to 10th	Night	51% 8% 12% 18% 10% 1	1440
	11th to 20th	Night	43% 8% 11% 23% 13% 2	1417
	21st to end	Night	44% 11% 15% 23% 8%	1551
June	1st to 10th	Night	61% 8% 10% 15% 5% 1	1440
	11th to 20th	Night	44% 9% 13% 22% 12% 1	1440
	21st to end	Night	53% 9% 13% 15% 9%	1440
July	1st to 10th	Night	45% 10% 18% 21% 6%	1401
	11th to 20th	Night	42% 12% 15% 22% 9% 1	1392
	21st to end	Night	48% 13% 15% 18% 6% 1	1486
August	1st to 10th	Night	40% 12% 18% 23% 7%	1422
	11th to 20th	Night	46% 11% 16% 20% 7%	1578
	21st to end	Night	38% 11% 19% 24% 8%	1980
September	1st to 10th	Night	38% 13% 16% 23% 10%	1800
	11th to 20th	Night	42% 11% 13% 23% 11% 1	1810
	21st to end	Night	43% 10% 13% 24% 9% 1	2018
October	1st to 10th	Night	45% 10% 15% 21% 10%	2160
	11th to 20th	Night	51% 12% 15% 18% 3	2160
	21st to end	Night	60% 11% 10% 15% 4	2560
November	1st to 10th	Night	57% 13% 14% 12% 3	2422
	11th to 20th	Night	65% 13% 11% 9% 3	2660
	21st to end	Night	64% 15% 12% 7% 2	2660
December	1st to 10th	Night	72% 13% 8% 7% 1	2660
	11th to 20th	Night	75% 11% 7% 5% 2	3295
	21st to end	Night	72% 11% 10% 6% 1	4884

Seeing (when cloud cover <= 80%)
Color Meanings: Too cloudy to forecast Bad 1/5 Poor 2/5 Average 3/5 Good 4/5 Excellent 5/5
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	23% 24% 33% 16% 3	370
	11th to 20th	Day	23% 25% 31% 16% 4 1	356
	21st to end	Day	15% 25% 40% 18% 3	374
February	1st to 10th	Day	23% 26% 35% 14% 2	340
	11th to 20th	Day	21% 29% 32% 15% 2	336
	21st to end	Day	14% 20% 39% 21% 5% 1	280
March	1st to 10th	Day	16% 24% 36% 18% 5% 1	340
	11th to 20th	Day	15% 20% 36% 20% 8% 1	406
	21st to end	Day	24% 19% 31% 18% 7% 2	462
April	1st to 10th	Day	27% 23% 32% 12% 5%	420
	11th to 20th	Day	25% 17% 32% 18% 8%	412
	21st to end	Day	27% 11% 29% 23% 7% 1	514
May	1st to 10th	Day	28% 13% 28% 22% 6% 3	603
	11th to 20th	Day	22% 11% 25% 29% 12% 2	624
	21st to end	Day	19% 13% 32% 26% 8% 1	680
June	1st to 10th	Day	31% 8% 26% 26% 9% 1	630
	11th to 20th	Day	18% 7% 28% 34% 10% 2	630
	21st to end	Day	26% 6% 23% 27% 15% 2	630
July	1st to 10th	Day	21% 5% 25% 35% 12% 2	620
	11th to 20th	Day	16% 6% 24% 40% 12% 1	618
	21st to end	Day	23% 5% 23% 33% 15% 1	685
August	1st to 10th	Day	16% 4 20% 39% 19% 2	625
	11th to 20th	Day	18% 7% 26% 28% 18% 4	470
	21st to end	Day	14% 8% 27% 35% 13% 2	495
September	1st to 10th	Day	15% 8% 32% 34% 8% 3	450
	11th to 20th	Day	25% 13% 30% 22% 10% 2	444
	21st to end	Day	21% 10% 35% 23% 11% 1	360
October	1st to 10th	Day	19% 13% 33% 22% 12%	360
	11th to 20th	Day	23% 14% 30% 20% 11% 2	360
	21st to end	Day	28% 19% 30% 16% 6%	396
November	1st to 10th	Day	28% 21% 26% 19% 5% 2	365
	11th to 20th	Day	31% 20% 30% 15% 3 1	370
	21st to end	Day	31% 24% 25% 17% 3	370
December	1st to 10th	Day	31% 19% 34% 12% 3	370
	11th to 20th	Day	31% 26% 28% 13% 1 1	370
	21st to end	Day	25% 27% 29% 13% 5% 1	407
January	1st to 10th	Night	23% 27% 30% 16% 4	850
	11th to 20th	Night	23% 25% 33% 15% 3	829
	21st to end	Night	18% 23% 37% 18% 4	876
February	1st to 10th	Night	24% 20% 34% 20% 2	720
	11th to 20th	Night	21% 25% 34% 16% 3	703
	21st to end	Night	15% 18% 34% 25% 7%	592
March	1st to 10th	Night	21% 15% 36% 23% 4 1	720
	11th to 20th	Night	20% 17% 29% 24% 8% 1	720
	21st to end	Night	25% 15% 31% 22% 6% 2	658
April	1st to 10th	Night	26% 16% 29% 23% 6%	540
	11th to 20th	Night	22% 14% 27% 30% 7%	534
	21st to end	Night	27% 11% 28% 22% 11% 1	540
May	1st to 10th	Night	30% 7% 26% 23% 11% 4	540
	11th to 20th	Night	22% 8% 24% 29% 14% 3	532
	21st to end	Night	20% 9% 30% 30% 10% 1	583
June	1st to 10th	Night	31% 9% 26% 28% 6% 1	540
	11th to 20th	Night	22% 6% 24% 33% 13% 2	540
	21st to end	Night	27% 4 23% 34% 11% 2	540
July	1st to 10th	Night	18% 5% 20% 37% 18% 1	526
	11th to 20th	Night	17% 5% 19% 43% 16%	522
	21st to end	Night	24% 4 18% 38% 15% 1	590
August	1st to 10th	Night	17% 2 21% 38% 19% 2	538
	11th to 20th	Night	20% 4 20% 35% 16% 3	532
	21st to end	Night	17% 4 22% 38% 19% 1	594
September	1st to 10th	Night	15% 7% 31% 32% 12% 1	540
	11th to 20th	Night	23% 11% 25% 28% 12% 1	540
	21st to end	Night	23% 11% 29% 27% 9% 1	578
October	1st to 10th	Night	19% 11% 32% 28% 10%	720
	11th to 20th	Night	27% 13% 26% 23% 10% 1	720
	21st to end	Night	31% 16% 29% 19% 4 1	884
November	1st to 10th	Night	25% 19% 30% 20% 4 1	830
	11th to 20th	Night	28% 24% 27% 15% 5% 1	850
	21st to end	Night	30% 20% 32% 14% 3	850
December	1st to 10th	Night	30% 22% 30% 13% 5%	850
	11th to 20th	Night	30% 29% 26% 11% 3 1	850
	21st to end	Night	25% 25% 31% 15% 2 1	935

Page generated at 2024-01-13 10:37:52. Version ac07

Copyright 2024 Attilla Danko